add python 3.9 support tests and deployment

--add python 3.9 compatibility check
--revise wheel deployment scripts (remvoed yum commands, because not
needed, it was a relic from old times)

.circleci/config.yml

@@ -181,8 +181,7 @@ jobs:
     docker:
       - image: "circleci/python:3.6"
     environment:
-      - CIBW_BUILD: "cp36-manylinux_x86_64 cp37-manylinux_x86_64 cp38-manylinux_x86_64"
-      - CIBW_BEFORE_ALL: "yum install -y gcc ninja-build"
+      - CIBW_BUILD: "cp36-manylinux_x86_64 cp37-manylinux_x86_64 cp38-manylinux_x86_64 cp39-manylinux_x86_64"
       - CIBW_BEFORE_BUILD: "pip install cmake setuptools-scm -r requirements.txt && pip install -r requirements-dev.txt"
     steps:
       - checkout
@@ -194,7 +193,7 @@ jobs:
     macos:
       xcode: 11.0.0
     environment:
-      - CIBW_BUILD: "cp36-macosx_x86_64 cp37-macosx_x86_64 cp38-macosx_x86_64"
+      - CIBW_BUILD: "cp36-macosx_x86_64 cp37-macosx_x86_64 cp38-macosx_x86_64 cp39-macosx_x86_64"
       - CIBW_BEFORE_BUILD: "pip3 install cmake setuptools-scm -r requirements.txt && pip3 install -r requirements-dev.txt"
     steps:
       - checkout
@@ -215,6 +214,9 @@ workflows:
       - python-check:
           name: Python 3.8
           version: "3.8"
+      - python-check:
+          name: Python 3.9
+          version: "3.9"
 
   macos-check:
     jobs:
@@ -227,6 +229,9 @@ workflows:
       - python-macos-check:
           name: MacOS Python 3.8
           python-version: "3.8"
+      - python-macos-check:
+          name: MacOS Python 3.9
+          python-version: "3.9"
 
   linux-deploy:
     jobs:
@@ -261,7 +266,7 @@ workflows:
     jobs:
       - python-formatting-check:
           name: Python formatting check
-  
+
   health-check:
     triggers:
       - schedule: